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Submission #386116

# Submission time Handle Problem Language Result Execution time Memory
386116 2021-04-05T16:26:39 Z CaroLinda Snowball (JOI21_ho_t2) C++14
100 / 100
 1104 ms 18884 KB 
#include <bits/stdc++.h>
 
#define lp(i,a,b) for(int i = a ; i < b;  i++)
#define ll long long
#define all(x) x.begin(),x.end()
#define pb push_back
#define mk make_pair
#define pii pair<int,int>
#define sz(x) (int)(x.size())
#define ff first
#define ss second	

const int MAXN = 2e5+10 ;

using namespace std ;

int N , Q ;
ll L[MAXN] , R[MAXN] ;
ll X[MAXN] ;
vector< pair<ll,int> > pref , suf ;

int main()
{
	scanf("%d %d", &N , &Q ) ;
	for(int i = 1 ; i <= N ; i++ ) scanf("%lld", &X[i] ) ;

	ll t = 0 ;
	pref.pb(mk(0,0)) ;
	suf.pb(mk(0,0)) ;

	for(int i = 1 ; i <= Q ; i++ )
	{
		ll k ;
		scanf("%lld", &k ) ;
		t += k ;
		pref.pb(mk(t,i)) ;
		suf.pb(mk(t,i)) ;
	}

	sort(all(pref)) ;
	sort(all(suf)) ;

	for(int i = sz(suf)-2 ; i >= 0 ; i-- )
		suf[i].ss = min(suf[i].ss , suf[i+1].ss) ;

	for(int i = 1 ; i < sz(pref); i++ )
		pref[i].ss = min(pref[i-1].ss, pref[i].ss ) ;

	R[N] = suf.back().ff+X[N] ;

	for(int i = 1 ; i < N ; i++ )
	{
		ll l = X[i] , r = min(X[i+1],X[i]+suf.back().ff) , mid , best = X[i] ;

		while(l <= r)
		{
			if( l == r-1 ) mid = l ;
			else mid = (l+r)>>1 ;

			int t_mine = lower_bound(all(suf), mk(mid-X[i], -1) )->second ;
			
			auto it = upper_bound(all(pref), mk(mid-X[i+1],-1) ) ;
			int t_yours = Q+10 ;

			if(it != pref.begin() )
			{
				it-- ;
				t_yours = it->second ;
			}

			if(t_mine < t_yours) { best= mid ; l = mid+1 ; }
			else r = mid-1 ;

		}

		R[i] = best ;
	}

	L[1] = min(X[1]+pref[0].ff, X[1] ) ;

	for(int i = 2 ; i<= N ; i++ )
	{
		L[i] = min(X[i] , X[i]+pref[0].ff ) ;

		if( R[i-1] >= L[i] )
			L[i] = R[i-1] ;
	}

	lp(i,1,N+1) printf("%lld\n" , R[i]-L[i] ) ;
	//lp(i,1,N+1) printf("%lld %lld\n" , L[i] ,R[i]) ;

}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |  scanf("%d %d", &N , &Q ) ;
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:25:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |  for(int i = 1 ; i <= N ; i++ ) scanf("%lld", &X[i] ) ;
      |                                 ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |   scanf("%lld", &k ) ;
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 492 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 7 ms 492 KB Output is correct
5 Correct 7 ms 492 KB Output is correct
6 Correct 6 ms 492 KB Output is correct
7 Correct 5 ms 492 KB Output is correct
8 Correct 5 ms 492 KB Output is correct
9 Correct 5 ms 640 KB Output is correct
10 Correct 4 ms 492 KB Output is correct
11 Correct 2 ms 492 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 7 ms 492 KB Output is correct
16 Correct 7 ms 492 KB Output is correct
17 Correct 5 ms 492 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 2 ms 492 KB Output is correct

Subtask #2
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 492 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 7 ms 492 KB Output is correct
5 Correct 7 ms 492 KB Output is correct
6 Correct 6 ms 492 KB Output is correct
7 Correct 5 ms 492 KB Output is correct
8 Correct 5 ms 492 KB Output is correct
9 Correct 5 ms 640 KB Output is correct
10 Correct 4 ms 492 KB Output is correct
11 Correct 2 ms 492 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 7 ms 492 KB Output is correct
16 Correct 7 ms 492 KB Output is correct
17 Correct 5 ms 492 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 2 ms 492 KB Output is correct
20 Correct 69 ms 9084 KB Output is correct
21 Correct 67 ms 8776 KB Output is correct
22 Correct 72 ms 8520 KB Output is correct
23 Correct 87 ms 8684 KB Output is correct
24 Correct 216 ms 9156 KB Output is correct
25 Correct 1049 ms 17032 KB Output is correct
26 Correct 1104 ms 16760 KB Output is correct
27 Correct 992 ms 16452 KB Output is correct
28 Correct 980 ms 16744 KB Output is correct
29 Correct 925 ms 16344 KB Output is correct
30 Correct 598 ms 15408 KB Output is correct
31 Correct 166 ms 15044 KB Output is correct
32 Correct 135 ms 15172 KB Output is correct
33 Correct 79 ms 2272 KB Output is correct
34 Correct 1079 ms 17220 KB Output is correct
35 Correct 1008 ms 16704 KB Output is correct
36 Correct 1060 ms 16788 KB Output is correct
37 Correct 1002 ms 16580 KB Output is correct
38 Correct 1002 ms 16708 KB Output is correct
39 Correct 980 ms 16644 KB Output is correct
40 Correct 591 ms 16580 KB Output is correct
41 Correct 66 ms 9544 KB Output is correct
42 Correct 122 ms 15244 KB Output is correct
43 Correct 354 ms 18372 KB Output is correct
44 Correct 62 ms 9460 KB Output is correct
45 Correct 401 ms 16708 KB Output is correct
46 Correct 342 ms 18520 KB Output is correct
47 Correct 384 ms 18756 KB Output is correct
48 Correct 130 ms 18884 KB Output is correct